add NamePublishOption AllowWhileMounted

[ec1oud]

We need to bypass the publishing lock-out within the IPNS Fuse implementation itself, to fix github/ipfs/kubo/#2168
Anyway, perhaps the "solution" to ipfs/kubo#964 needs to become configurable.

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[aschmahmann]

@ec1oud this seems like part of a larger set of PRs (i.e. this only gives a flag), should they be linked here? The maintainers are low on bandwidth to review at the moment so trying to understand the scope of the inbound PRs in case we need to allocate time to review or comment.

[lidel]

Note from triage: closing due to 2 weeks of no response from the author.